Opt-in advertising isn’t exactly a new concept. In many industries it has become so standard that it’s not often mentioned, simply running along in the background, quietly supplying quality leads. Targeting and delivery capabilities have evolved with technology, but opt-in advertising has continued to be the standard in lead generation. And it’s a workhorse that delivers powerful results. But now more than ever it can and should be an integral part of your lead generation strategy. Here are three reasons opt-in advertising matters now more than ever.